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| author | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-09-03 20:43:36 -0500 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-09-09 11:51:15 -0700 |
| commit | deac93df26b20cf8438339b5935b5f5643bc30c9 (patch) | |
| tree | 8e67edd505e4a8bde380c724b67ce9ca98b8ee91 /arch/ia64 | |
| parent | 7ae115b4f50d3c5824f1a15e572b5de9d1b06d35 (diff) | |
| download | linux-stable-deac93df26b20cf8438339b5935b5f5643bc30c9.tar.gz linux-stable-deac93df26b20cf8438339b5935b5f5643bc30c9.tar.bz2 linux-stable-deac93df26b20cf8438339b5935b5f5643bc30c9.zip | |
lib: Correct printk %pF to work on all architectures
It was introduced by "vsprintf: add support for '%pS' and '%pF' pointer
formats" in commit 0fe1ef24f7bd0020f29ffe287dfdb9ead33ca0b2. However,
the current way its coded doesn't work on parisc64. For two reasons: 1)
parisc isn't in the #ifdef and 2) parisc has a different format for
function descriptors
Make dereference_function_descriptor() more accommodating by allowing
architecture overrides. I put the three overrides (for parisc64, ppc64
and ia64) in arch/kernel/module.c because that's where the kernel
internal linker which knows how to deal with function descriptors sits.
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Acked-by: Tony Luck <tony.luck@intel.com>
Acked-by: Kyle McMartin <kyle@mcmartin.ca>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/ia64')
| -rw-r--r-- | arch/ia64/include/asm/sections.h | 3 | ||||
| -rw-r--r-- | arch/ia64/kernel/module.c | 12 |
2 files changed, 15 insertions, 0 deletions
diff --git a/arch/ia64/include/asm/sections.h b/arch/ia64/include/asm/sections.h index 7286e4a9fe84..a7acad2bc2f0 100644 --- a/arch/ia64/include/asm/sections.h +++ b/arch/ia64/include/asm/sections.h @@ -21,5 +21,8 @@ extern char __start_gate_brl_fsys_bubble_down_patchlist[], __end_gate_brl_fsys_b extern char __start_unwind[], __end_unwind[]; extern char __start_ivt_text[], __end_ivt_text[]; +#undef dereference_function_descriptor +void *dereference_function_descriptor(void *); + #endif /* _ASM_IA64_SECTIONS_H */ diff --git a/arch/ia64/kernel/module.c b/arch/ia64/kernel/module.c index 29aad349e0c4..545626f66a4c 100644 --- a/arch/ia64/kernel/module.c +++ b/arch/ia64/kernel/module.c @@ -31,9 +31,11 @@ #include <linux/elf.h> #include <linux/moduleloader.h> #include <linux/string.h> +#include <linux/uaccess.h> #include <linux/vmalloc.h> #include <asm/patch.h> +#include <asm/sections.h> #include <asm/unaligned.h> #define ARCH_MODULE_DEBUG 0 @@ -941,3 +943,13 @@ module_arch_cleanup (struct module *mod) if (mod->arch.core_unw_table) unw_remove_unwind_table(mod->arch.core_unw_table); } + +void *dereference_function_descriptor(void *ptr) +{ + struct fdesc *desc = ptr; + void *p; + + if (!probe_kernel_address(&desc->ip, p)) + ptr = p; + return ptr; +} |